In the Sunlit Southern Hemisphere of Uranus, the Observed Variation

In the sunlit southern hemisphere of Uranus, the observed variation of temperature with latitude is:

A) unknown, because Uranus is too far away for us to measure temperatures at different latitudes.
B) much cooler at the equator than at the south pole because the south pole is tilted almost directly toward the Sun.
C) much cooler at the south pole than at the equator because the Sun is always close to (or below) the horizon, as seen from the pole of any planet.
D) almost nonexistent between the equator and the south pole, implying an efficient equator-to-pole circulation pattern.